Problems animating bones-paper plane
You can join all your bones to make a unique armature (ctrl J) or recreate your armature from scratch. In both cases it's better to create an additional big bone which won't have any weight on the mesh but will be the parent of all your bones. To do that you will have to select all your bones, then, at last, the parent bone you have created and ctrl P > Keep Offset. You also have to control that the influence of your bones on the mesh is correct, either in Weight Paint mode, or with Vertex Groups assignments.

When all this will be finished you can create the wings animation and repeat this animation in loop with the NLA editor, and move the whole armature along a straight line or along a curve with a Follow Path.